PaulJ's H4 Mongrel Build x 2

PaulJ · Post by **PaulJ** » Wed Dec 04, 2019 5:39 pm

That pesky 74ls07 showed up a couple hours ago and I have to say I'm quite pleased with initial tests. The only issue I've found so far is the video is really washed out but everything very stable and working fine. See photos... Haven't tried tos yet because when I cleaned up to do the smoke test I lost my jump box. Also I tried both video settings and no difference. May try and adjust monitor for signal but more testing to do..Sure glad I didn't use any of Phils magic black smoke.

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Post by **exxos** » Wed Dec 04, 2019 5:41 pm

Post by **Icky** » Wed Dec 04, 2019 5:42 pm

Well done @PaulJ

Post by **PhilC** » Wed Dec 04, 2019 5:48 pm

Well done @PaulJ

PaulJ · Post by **PaulJ** » Wed Dec 04, 2019 5:50 pm

Yes, tos appears to work fine so I'm making a floppy power cable to see if I can run bench6 but it looks real promising.. couldn't adjust monitor so the circuit will most likely need a tweek but I have to commend you and Exxos for designing a board that pretty much runs out of the gate..

:cheer:

PaulJ · Post by **PaulJ** » Wed Dec 04, 2019 6:30 pm

Just ran bench6 via floppy and everything is as expected. Forgot how slow things are with no enhancements. After some additional testing via the diagnostics card will be installing the glitter and ultra satan. Once again nice job Exxos, Icky!

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PaulJ · Post by **PaulJ** » Wed Dec 04, 2019 6:52 pm

Gave highres a go and its perfect. Also the board fits well in the atari case and bottom shield.

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JezC · Post by **JezC** » Wed Dec 04, 2019 6:56 pm

Does that mean that you're the winner of the competition?

Very impressive build.

PaulJ · Post by **PaulJ** » Wed Dec 04, 2019 7:12 pm

I would guess since that was the condition of the competition. This this board must have good noise immunity. When I did the first bench6 pass the power supply was in constant current mode where the voltage was 4.48 volts and it still loaded the program and ran it successfully. With no eiffel keyboard simulator the board runs at ~1.45 amps. I had the supply set to 1.5 amps max current so when I connected the eiffel, keyboard and mouse the system wants ~ 1.8 amps driving the supply into constant current mode dropping the voltage to 4.48 and it ran fine.

Post by **exxos** » Wed Dec 04, 2019 7:27 pm

Great job Paul :cheer:

PaulJ's H4 Mongrel Build x 2

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